Exam 45: Plant Reproduction and Development

Both monocots and dicots protect their young shoots as they emerge from the soil. Describe how each group accomplishes this.

Grass flowers lack petals and sepals. Which of the following statements is TRUE?

A group of geneticists exposed the seeds of a dicot plant to various levels of radiation in order to induce random mutations. Many of the irradiated seeds failed to germinate. Some of the seeds, however, germinated in the lab a were carefully studied. The scientists discovered a mutation that prevents the formation of a hypocotyl hook dur germination. Based on this scenario, the mutant plant most likely germinated

How many sperm nuclei are necessary for the successful fertilization of flowering plants?

In flowering plants, the unfertilized ovule contains the

In primitive land plants, such as mosses and ferns, how does the sperm get to the egg?

In general, plants have evolved from to .

An oak tree is a

In north- central Florida, the cars, homes, streets, and ponds are covered with an impressive coating of bright yellow dust every spring. Upon closer, microscopic examination, the yellow "dust" turns out to be pollen grains. This area of Florida has pine trees, showy daytime- flowering plants, and often- unnoticed nighttime- flowering plants, with sweet- scented flowers, releasing pollen at the same time of year. Based on this information, which group of plants do you think is responsible for the yellow pollen? Why?

Plants that live in temperate latitudes often make seeds that exhibit dormancy. What is the advantage of having dormant seeds for plants in these areas?

In dicots, the shoot tip is protected by

Spores and gametes are both haploid reproductive cells. What is the difference between the two?

Desert plants often have _ _ in their seed coats that keep them dormant until there is enough rain to complete their life cycle.

In monocots, the shoot tip is protected by , which eventually degenerate(s) once exposed to air.

A diploid fertilized egg is called a(n) _ .

Which of the following is TRUE for female reproductive structures in angiosperms?

The process in flowering plant reproduction in which the first sperm unites with an egg to form a diploid zygote and the second sperm unites with two haploid polar bodies to form the diploid endosperm is called double fertilization.

In the life cycle of a fern, the large fern plant that we normally see is the

The male reproductive structure, the stamen, consists of

All of the following are processes that occur during angiosperm reproduction EXCEPT